Exhaust apparatus for vacuum-brake ejectors



- (No Model.)

E. LONGSTRETH. Exhaust Apparatus for Vacuum Brake Ejectors.

Paten ted Oct. 12,1880.

W1 Th 68156."

N, FETERS,'PHOTO-LI1HDGRAPHER. WASHINGTON. n c.

UNITED STATES PATENT OFFICE EDWARD LONGSTRETH, OF PHILADELPHIA, PENNSYLVANIA.

EXHAUST APPARATUS FOR VACUUM-BRAKE EJECTORS.

SPECIFICATION formingpart of Letters Patent No. 233,263, dated. October 12, 1880. Application filed July 2, 1880. (No model.)

To all whom it may concern Be it known that I, EDWARD LONGSTRETH, acitizen of the United States, residing at Philadelphia, Pennsylvania, have invented an Improvement in Exhaust Apparatus for Vacuum- Brake Ejectors, of which the following is a specification.

My invention relates to locomotive-engines in which ejectors are used in connection with vacuum-brakes; and the object of myinvention is to prevent the disagreeable noise resulting from the discharge of steam from the ejector when the brakes are operated--an object attained by directing this waste steam to the exhaust-passage of one of the cylinders of the engine, as explained hereinafter.

In the accompanying drawings, Figure l is an outline view of the fire-box end of a locomotive-boiler illustrating my invention; Fig. 2, a transverse section of part of the smoke-box end of the locomotive.

Referring to Fig. 1, A represents the firebox of a locomotive-boiler, and to the top of this fire-box is secured the ejector B for operating the vacuum-brakes of the train to which the locomotive is coupled. As this instrument is well known and is generally adopted when vacuum-brakes are used, it will suffice to remark that in the chest m of the ejector there is a nozzle communicating with the steam-space of the boiler when the cook a is open, and that the steam escaping from the nozzle in the branch d of the chest creates a partial vacuum in the branch 0 and in the vacuum-pipe f, which communicates with the braking apparatus of the cars.

It has been usual to permit the steam to escape from the branch d of the chest directly into the atmosphere whenever a vacuum has to be created in operating the brakes, and the result of this discharge is a sudden and disagreeable noise, which I obviate by forming a communication, through a pipe, h, between the branch at of the nozzle and the exhaust-passage 'w of one of the cylinders D of the engine, the pipe being furnished with a check-valve, y, to prevent the exhaust-steam from condensing in the said pipe h. This check-valve is of common construction, and consists of a chest containin g a valve proper, which opens downward, a light spring tending to restore the valve to its seat when the discharge of steam from the ejector through the pipe h is discontinued.

The invention is applicable to engines in which compressed air or gas under pressure is used in place of steam.

I claim as my invention- The combination of the outlet-pipe of the ejector and exhaust passage or chamber of the engine with a pipe by which the waste steam from the ejector may be conveyed to the said exhaust-passage, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD LONGSTRETH.

Witnesses ALEXANDER PATTERSON, HARRY SMITH. 

